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The answer to the first volume of the seventh grade mathematics exercise book of People's Education Edition is 25~26 pages.
(3)=4x？ + 16y？

(4) The 4th power of 4)4a-0 of 65438+4.

7、

( 1)= 10000+0.04-2 10

= 9960.04

(2)=4000000+20000+25

=4020025

8、

( 1)a？ +4ab+4b？ -9

(2) the fourth power of x-x? 6x 9

(3)8xy+ 12y+6x+ 18

I didn't do the ninth question-

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